User`s manual

4
SIEMENS (S5 COMMUNICATIONS) REFERENCE
Note If an odd number of characters is received from the scanner, a Null
character is added to create an even byte count. This facilitates word
writes to the controller.
If keypad entry is enabled, the operator may also enter the decimal
equivalent of an ASCII character in the data entry field. For example, an
operator can manually enter 2 characters and then scan a bar code
containing 8 characters. The SOI then writes all 10 characters to the
controller.
The SOI writes data to the controller on receipt of an ASCII carriage
return or when the RETURN key is pressed.
Special Switch Settings
The SIMATIC S5 programmable controller does not require any special
DIP switch or other switch settings to establish communications with
the SOI.
The SOI communications parameters (baud rate, data bits, and parity)
must match that of the S5 processor, but unless you have changed these
parameters in the S5 processor, you should not have to reset anything:
the default SOI settings match those of the S5 processor.
The SOI DIP switch settings are described in the SOI-120 and SOI-260
Operator Interface User Manuals.